DC FieldValueLanguage
dc.contributor.authorSchmandt, Bastian-
dc.contributor.authorHerwig, Heinz-
dc.date.accessioned2020-06-03T12:23:07Z-
dc.date.available2020-06-03T12:23:07Z-
dc.date.issued2015-08-
dc.identifier.issn1879-2278de_DE
dc.identifier.urihttp://hdl.handle.net/11420/6227-
dc.description.abstractIn this study, the phenomenon of negative "loss"-coefficients reported in various studies about turbulent branched flows through combining junctions is investigated systematically. It turns out, that the "loss" for one branch of a junction and its adjacent ducts only in parts is due to devaluation of mechanical energy, which would be a real loss, so that the term energy change is more appropriate. The other part of the energy change which is not due to a loss is due to a mutual energy transfer between the two partial flows. As a consequence, non-dimensional coefficients should be called energy change coefficients rather than head loss coefficients whenever branching of flows occurs. Furthermore, a method is introduced by which losses and the energy transfer are determined directly in the flow field. The field values allow a quantification and visualization of the local loss and work transfer, while their integral values can be used to quantify the individual contributions of losses and energy transfer within the energy change of a flow through a junction.en
dc.language.isoende_DE
dc.publisherElsevier Sciencede_DE
dc.relation.ispartofInternational journal of heat and fluid flowde_DE
dc.subjectBranchingde_DE
dc.subjectDissipationde_DE
dc.subjectEnergy transferde_DE
dc.subjectJunctionde_DE
dc.subjectMixerde_DE
dc.subjectNegative loss coefficientde_DE
dc.subject.ddc530: Physikde_DE
dc.subject.ddc600: Technikde_DE
dc.subject.ddc620: Ingenieurwissenschaftende_DE
dc.titleThe head change coefficient for branched flows : why "losses" due to junctions can be negativede_DE
dc.typeArticlede_DE
dc.type.diniarticle-
dcterms.DCMITypeText-
tuhh.abstract.englishIn this study, the phenomenon of negative "loss"-coefficients reported in various studies about turbulent branched flows through combining junctions is investigated systematically. It turns out, that the "loss" for one branch of a junction and its adjacent ducts only in parts is due to devaluation of mechanical energy, which would be a real loss, so that the term energy change is more appropriate. The other part of the energy change which is not due to a loss is due to a mutual energy transfer between the two partial flows. As a consequence, non-dimensional coefficients should be called energy change coefficients rather than head loss coefficients whenever branching of flows occurs. Furthermore, a method is introduced by which losses and the energy transfer are determined directly in the flow field. The field values allow a quantification and visualization of the local loss and work transfer, while their integral values can be used to quantify the individual contributions of losses and energy transfer within the energy change of a flow through a junction.de_DE
tuhh.publisher.doi10.1016/j.ijheatfluidflow.2015.06.004-
tuhh.publication.instituteTechnische Thermodynamik M-21de_DE
tuhh.publication.instituteThermofluiddynamik (M-21H)de_DE
tuhh.type.opus(wissenschaftlicher) Artikel-
dc.type.driverarticle-
dc.type.casraiJournal Article-
tuhh.container.volume54de_DE
tuhh.container.startpage268de_DE
tuhh.container.endpage275de_DE
local.status.inpressfalsede_DE
item.creatorGNDSchmandt, Bastian-
item.creatorGNDHerwig, Heinz-
item.openairecristypehttp://purl.org/coar/resource_type/c_6501-
item.grantfulltextnone-
item.languageiso639-1en-
item.openairetypeArticle-
item.cerifentitytypePublications-
item.creatorOrcidSchmandt, Bastian-
item.creatorOrcidHerwig, Heinz-
item.fulltextNo Fulltext-
crisitem.author.deptThermofluiddynamik (HM-21)-
crisitem.author.deptTechnische Thermodynamik M-21-
crisitem.author.parentorgStudiendekanat Maschinenbau-
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